Spark-arrester.



'llo; 629,096. Patanted July I8, 1899.

N'. P. STEVENS. SPARK ABRESTER.

(App! cat on fllid Apr 10 1899) (In laid.)

Tu: uanms PETERS ca, warn-undo" wasumam, 0.1:.

' UNITED Srn'rns PATENT OFFICE.

NATHAN r. srnvnn's, or conconn, new HAMPSHIRE.

, jsP e AR RE's ea q s'rncrrronrron forming partoi Letters Patent no; 6279,096, dated July is, 1899.

7 Application filed April 10.13991 To all whom it may concern V Beitknown that I, NATHAN PLSTEVENS, of

Concord, county of Merrimac, State of New: 1

.ing drawings, is. a specification, like letters and figures on thedrawings representing like parts. v 1

This invention has for its object, the production of novel and efiectivespark arreSt: ing apparatusfor boilers,particularlyadapted forlocomotives, wherebysparks and cindersj are prevented frompassing outwith the 8X-' haust. 1 i i I have also herein provided a novel andconvenientreceptacle totwhich I'prefer to con duct the collectedcinders, said receptacle being emptied from time to time, as necessary.I have also provided means for obtaining ready access to the smoke-boxor portion of the boiler in which-the spark-arrestin g apparatus islocated.

My invention is herein illustrated in connection with alocomotive-engine, inasmuch as such use thereof is extensive, as willappear hereinafter, although my invention is not restricted thereto.

Figure 1, in vertical longitudinal section, represents the forward endof a locomotiveboiler with the smoke-box and exhaust out-g let, one formof my novel spark-arrester .bein g shown inoperative position in thesmoke b'ox, other features of my invention also be-- ing thereinillustrated. Fig. 2 is ajfront ele vation of the apparatus showninFig.1, the

head or outer end oi the smoke-box: being omitted; and Fig. 3 is ahorizontal sectional detail of the baffles,-ta ken on the line 0;, Fig.1.'

The boiler-shell A, fire-tubes ;A,- smokestackA and the upturned exhaustpipe or outlet E, Fig, 1, maybe and are of-usual 0011-;

The smoke-box-B is in itself of substantially well-known construction;butI have herein provided the same with ear-sh, which constitute hingemembers, the other members abeing attached teen-formed on the open frontend of the boiler, suitable pintles, as 3, connecting the hinge members,so that the smoke-box may be swung laterally to one a side when it isdesired to have accessto the s al lid. 712.475; "on moan.)

' contents thereofe' as, for instance, for cleaning or, for any otherpurpose.

Any, suitable locking device, as L, may be providedto retain thesmoke-box in normal position, forming a prolongation of the boiler, theinner end of the smoke box being open and its outer end closed by a headB.

7 An inclined'deflector-plate E extends from the tube-sheet A forwardtothe inner end 7 of the spark-arrester, to be described, theexhaust-outlet Epassing up through the plate, so that .the products ofcombustion are deflectedtoward the lower part of the boiler.

I have herein shown the spark-arrester as consisting of anopen-endedchamber having 7 parallel, top and bottom members 0 c, re- 'spectively,and sides 0 suitably supported in any desirable manner in the smoke-box,and I have herein shownstraps or brackets, as ,10, attached to thechamber and to the interior of the smoke-box to support said chamber inthe position shown in Figs. :1 and 2. The top a of the chamberat itsinner end is adapted to enter a recess .or groove, as e, formed in theforward endof the deflectorplate E, the products of combustion beingdeflected by said plate-to the inner end of the chamber, which istheinlet, while the gaseous matter escapes from its outer end or outletto the smoke-box, from which it is discharged through the stack. Thebottom 0 of the Aseries of comparatively.narrowandlatterly staggeredbafiles f? are-located in;the chamber, said bafiiesibeing concavedjontheir inlet'sides, as at f','{best"shown in Fig; 3,) andthe baffles areherein shown as concavoconvert in cross-section and providedwith lugs f?at their ends, whereby they are attached to the top and bottom of thechamber ,in any, suitable manner, as by bolts 15. Ad- 'jacent the lowerends of these baflies and attheir inlet sides the bottom plate 0' isprovided with a series of cinder outlets or openings 0 the baffles beingpreferably inclined, as herein'shown, from thebottom plateupward andrearwardly to the top plate 0.

The sparks and cinders entering the chamber from the boiler impingeagainst the bat- ICO sides thereof to the bottom of the chamber andthrough the cinder-outlets 0 passing thence to the compartment 13 at thebottom of the smoke-box, said compartment preferably being closed at itsrear end by a segmental plate 0", which may be attached to and dependfrom the bottom 0 of the baffle-chamber.

The construction of the chamber with flat top and bottom plates.provides a very simple and effective means for attaching the bafflesthereto, and the latter can thus be made of uniform length andpractically interchangeable, while at the same time the cinder-receivingspace 13 in the smoke-box is of considerable size.

It will be obvious that the sparks and cinders collected by thearresting device and deposited in the lower part of the smoke-box can beconveyed to any suitable point, and I have herein provided a novelreceptacle of sufficient size to retain a large quantity of the cinders,so that blowing out or emptying of such receptacle is only necessary atcomparatively long intervals. The receptacle is herein shown as aninclosed or box-like cowcatcher supported on a suitable frame or anextension A of the main frame, the cow catcher being preferably made ofsheet-iron, with sides It, angular top 7t, bottom 7L2, and back 7L3, thetop portion h being provided with heavy metal strengthening-ribs h andthe whole shaped substantially as the usual coWcatcher, the top portionsbeing bent up, as at h to meet the sides h. The cowcatcher soconstructed forms a closed or boxlike receptacle of large capacity, andI have herein shown it connected, as by a duct 'm, with a hopper-likebottom B secured to the under side of the smoke-box in any suitablemanner and communicating therewith through a slot or opening in the smoke-box. The hopper-bottom B is herein shown as con,- nected by boltswith the upper end of the duct m, so that the latter can be detachedwhen it is desired to swing the smoke-box to one side.

The cow-catcher or cinder-receptacle II may be provided withnormally-closed blow-out openings H, as shown in Fig. 1.

It will be l'nanifest that the products of combustion as they pass fromthe fines will be deflected by the plate E into the openended chamber 0,traveling through the tertuous passages formed by the battles f and thesparks and cinders or the major portion thereof will be conducted to anddischarged throughthe outlets 0 into the lower part of the smoke-box andthence into the hopper,- bottom B and the collected. cinders and sparkspass thence by gravity to the cinderreceptacle or cow-catcher II.

The draft created by the exhaust will draw the gaseous products ofcombustion through the chamber 0 and through its open outer end into thesmoke-box, whence such gaseous matter will be discharged through thestack substantially free from sparks or cinders.

Inasmuch as the spark-arresting chamber 0 may be supported in anysuitable manner in the smoke-box, my invention is not restricted to theparticular means herein shown, as I have merely illustrated onepractical mode of support.

The arrows 40 on Fig. 1 indicate the direction of travel of the cindersor sparks and the arrows the passage of the gaseous products ofcombustion.

My invention is not restricted to the precise construction andarrangements'hown and described, as the same may be modified andrearranged in many particulars without departing from the spirit andscope of my in.- vention. 1

Having fully described my invention, what I claim, and desire to secureby Letters Patent, is-

l. A spark-arrester comprising a chamber to receive the products ofcombustion and hav ing inlet and outlet openings, a series oflaterally-staggered imperforate baflies intermc diate said openings andconcaved on their inlet sides, and cinder-outlets in the chamberadjacent the lower ends and at the inlet sides of the baflies.

2. A spark-arrester comprising a chamber to receive the products ofcombustion and having inlet and outlet openings, a series oflatorally-staggered,concavo-conveximperforate battles inclined from thetop to the bottom of said chamber with their concave sides toward theinlet, and cinder-outlets in said chamber adjacent the lower ends and atthe inlet sides of the baflles.

3. A spark-arrester comprising an open ended elongated chamber havingits top and bottom parallel, to receive products of combustion at oneend and having an outlet at its other end, laterally-staggeredimperforate battles inclined from the top to the bottom of the chamberand concave at their inlet sides, and cinder-outlets adjacent the lowerends and at the inlet sides of the baffles.

at. A spark-arrester comprising a chamber to receive the products ofcombustion and having inlet and outlet openings, a series oflaterally-staggered imperforate battles intermediate said openings andextended from the top to the bottom of the chamber, and cinderoutlets inthe chamber adjacent the lower ends and at the inlet sides of thebaffles.

5. In a locomotive, a spark-arrester having inlet and outlet openingsfor the products of combustion, staggered baffles intermediate saidopenings, cinder-outlets adjacent the lower ends and at the inlet sidesof the batfies, a box-like cow-catcher, and a connection between it andthe several cinder-outlets, to convey cinders to the said cow-catcher.

6. In a locomotive, a spark-arrester into which the products ofcombustion pass, an inclosed or box-like cow-catcher, and means toconvey cinders from the spark-arresterto the cow-catcher.

7. In a locomotive, a smoke-box, a sparks'zpe W e arrester thereinhaving cinder-outlets com name he this speeifieabien in the presence ofmunicating with a chamber in the bottom of two subscribing witnesses.the smoke-box an inclosed cow-catcher, and T a. connection between saidchamber and the v i H NATHAN STEVEL 5 cow-catcher, to convey Cinders tothe latter Vifinesses': V

from the chamber. JOHN G. EDWARDS,

Izi testimony whereof I have signed my AUGUSTA E. DEAN".

